text: Hollow sphere,as a general model of solid sphere,is often used in heat transfer engineering projects,while it is seldom investigated.This model assumes that it has large convective heat transfer coefficient,a heat-insulative inner surface,and does not contain an inner heat source.The transient heat transfer model of a hollow sphere under a constant-heating environment is derivated,using the conventional method of seperation of variables.Particularly,the Cm coefficient in the complete solution can be obtained by spherical Bessel equation.Besides,a 3D temperature field is plotted using Matlab.This model supplies a general and convenient tool for analysis of homogeneous sphere heat tranfer problems.